Title

Quantum Efficiency Modification Of Organic Fluorophores Using Gold Nanoparticles On Dna Origami Scaffolds

Abstract

We used DNA origami as a platform to coassemble a 20 nm gold nanoparticle (AuNP) and an organic fluorophore (TAMRA) and studied the distance-dependent plasmonic interactions between the particle and the dye using steady state fluorescence and lifetime measurements. Greater fluorescence quenching was found at smaller dye-particle distances, which was accompanied by an enhancement of the decay rate. We also fabricated 20 and 30 nm AuNP homodimers using DNA origami scaffolds and positioned a Cy3 fluorophore between the AuNPs in both assemblies. For each particle size, three different interparticle distances were investigated. Up to 50% enhancement of the Cy3 fluorescence quantum efficiency was observed for the dye between the 30 nm AuNPs. These results are in good agreement with the theoretical simulations. © 2013 American Chemical Society.

Publication Date

6-20-2013

Publication Title

Journal of Physical Chemistry C

Volume

117

Issue

24

Number of Pages

12735-12744

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/jp312422n

Socpus ID

84879445246 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84879445246

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